Evidence of plastic deformation in structural materials. Also called plastic flow or creep. See also flow.

Imparting resistance to oxidation to an iron or steel surface by heating in aluminum powder at 800 to 1000

The lowest value of oxidizing potential at which pits nucleate and grow. It is dependent on the test method used.

The property of a material by virtue of which deformation caused by stress disappears upon removal of the stress. A perfectly elastic body completely recovers its original shape and dimensions after release of stress.

See principal stress (normal).

A change in dimensions directly proportional to and in phase with an increase or decrease in applied force.

The coating, usually green, that forms on the surface of metals such as copper and copper alloys exposed to the atmosphere. Also used to describe the appearance of a weathered surface of any metal.

A segregated structure consisting of alternating nearly parallel bands of different composition, typically aligned in the direction of primary hot working.

Coating containing zinc powder pigment andan organic resin.

The fracture toughness determined under dynamic loading conditions; it is used as an approximation of KIc for very tough materials.

The minimum value of Kc for any given material and condition, which is attained when rapid crack propagation in the opening mode is governed by plane-strain conditions.

A strongly alkaline solution into which metal is immersed for etching. for neutralizing acid, or for removing organic materials such as greases or paints.

A wood-pulping process in which sodium sulfate is used in the caustic soda pulp-digestion liquor. Also called kraft pulping or sulfate pulping.

Plating with dummy cathodes.

The selective leaching or corrosion of a specific constituent (Al, Ni, Mo, Ni) from an alloy.

Any interruption in the normal physical structure or configuration of a part, such as cracks, laps, seams, inclusions, or porosity. A discontinuity may or may not affect the usefulness of the part.

A linear imperfection in a crystalline array of atoms. Two basic types are recognized: (1) an edge dislocation corresponds to the row of mismatched atoms along the edge formed by an extra, partial plane of atoms within the body of a crystal; (2) a screw d ...

The relative humidity above which the atmospheric corrosion rate of some metals increases sharply.

A chemical substance or mixture that prevents or reduces the rate of the cathodic or reduction reaction by physical, physico-chemical or chemical action.

A term generally applied to paints to describe holidays, holes, and skips in a film. Also used to describe shrinkage in castings and weld.